public bool AddEmployer(Employer emp)
        {
            try
            {
                queryString = "insert into EMPLOYESS(HID,PERSON_NUMBER,SURNAME_EMPLOYER,NAME_EMPLOYER,PATRONOMIC_EMPLOYER,HID_ORGANIZATION,HID_DEPARTMENT,POST,ID_CARD)" +
                    "values(EMPLOYESS_HID.NEXTVAL,'" + emp.PersonNumber +
                    "','"  + emp.SurnameEmployer + "','" + emp.NameEmployer + "','" + emp.PatronomicEmployer +
                    "','" + emp.HID_ORGANIZATION + "','" +  emp.HID_DEPARTMENT + "','" + emp.Post +"','"+emp.ID_Card+"')";

               UpdInsQuare(queryString);
               Commit();
               queryString = "";
            }
            catch
            {
                return false;
            }
            return true;
        }